BlueStar FORENSIC IDENTI-HEM User guide

BlueStar
Brand
BlueStar
Model
FORENSIC IDENTI-HEM
Type
User guide

This manual is also suitable for

BLUESTAR® Identi-HEM®
Rapid test For the Detection of
Human Haemoglobin
For Use in Forensic Medicine
Instructions for Use
BLUESTAR® - Updated 2019.10.22
INTENDED USE
BLUESTAR® Identi-HEM® allows the rapid detection of human
haemoglobin (which is the main component of blood) for forensic
use. It could be used directly in scenes crime or in any place
where the presence of human blood has to be accurately
investigated thanks to the specific components supplied into the
kit.
PRINCIPLE
Haemoglobin is one of the main elements of blood. This protein
is a choice marker for blood detection even when the quantity is
very low. Moreover, thanks to the use of monoclonal antibodies,
obtained from very complex cell culture techniques, immunology
methods, used also in forensic medicine, provide both very high
sensitivity and high specificity for human blood detection.
BLUESTAR® Identi-HEM® is a rapid, qualitative immune-
chromatographic test, in a device, for specific detection of human
haemoglobin.
This method uses a unique combination of monoclonal
antibodies bound to colloidal gold and polyclonal antibodies
bound onto a solid phase in order to selectively identify, with high
sensitivity and specificity, human haemoglobin.
After being collected with the provided swab, the sample is
placed into an extraction buffer. After the sample has been
dispensed on the cassette, the extraction medium is absorbed
through migration, the antibodies bound to the colloidal gold then
bind to the haemoglobin to form an antibody-antigen complex.
This complex then binds to the anti-haemoglobin antibodies
present into the test area, and then a wine-coloured line appears.
If there is no haemoglobin, no coloured line appears in the test
area.
The mix keeps on migrating onto the membrane, goes beyond
the test area, and then binds to the reagents into the control area
to produce a wine-coloured line, guaranteeing the reaction
performed correctly.
KIT CONTENTS
Each kit contains all the components needed to perform 6 or 24
tests according to product reference:
Ref. VD-HEM-6: 6 x BLUESTAR® Identi-HEM® tests
Ref. VD-HEM-24: 24 x BLUESTAR® Identi-HEM® tests
Quantity
Component
6 or 24 BLUESTAR® Identi-HEM® device
6 or 24 Collection tube (bottle type) containing 2 ml
extraction buffer
6 or 24 Sterile swab
1 Instructions leaflet
STORAGE AND STABILITY
- All the components of BLUESTAR® Identi-HEM® kit should
be stored at room temperature (4°C to 30°C).
- DO NOT FREEZE.
- The BLUESTAR® Identi-HEM® test is stable until the expiry
date mentioned on the test foil pouch.
PRECAUTIONS
- This test is only for forensic medicine use.
- Carefully read the use instructions before using the test.
- Handle all the samples as if they would contain infectious
agents. When the test is completed, discard the samples
and swabs with all the necessary precautions.
- Wear protection clothes, such as laboratory coats and
single-use gloves to test the samples. Avoid any contact with
the hands, eyes or nose when collecting and testing the
samples.
- The extraction buffer, containing sodium azide 0.02%, may
irritate the skin, eyes or mucosa. Immediately wash the
contaminated areas if the solution touches the skin.
- Do not eat, drink, or smoke into the area where the samples
and reagents are handled.
- Do not use the test after the expiry date mentioned on the
test packaging label.
- Do not use a test if its foil pouch is damaged.
- Use the swabs provided with the kit.
SAMPLE COLLECTION AND PREPARATION
1. The samples should be collected under standard collection
conditions (aseptically and so as to avoid any
contamination). Each sample should be treated as if it was
potentially infectious.
2. Use the swabs provided with the test to collect the sample.
3. Ensure not to break the collection tube tip.
4. Unscrew the cap of the tube, by keeping it vertically in order
not to spill the extraction buffer.
5. Collect the samples of the presumed blood trace with the
sterile swab provided with the test (in case of dry sample, it
is possible to previously humidify the swab with the
extraction buffer contained into the collection tube.)
6. Immerse the swab, by vigorously shaking it for 10 seconds,
into the tube containing the buffer so that the sample is
correctly mixed with the buffer.
7. Remove the swab from the plastic tube while squeezing it
against the tube wall to extract the most liquid possible.
8. Dispose of the swab, then rescrew the cap back onto the
tube.
9. The collected sample is stable at room temperature (4°C to
30°C) but should be tested within 7 days.
PROCEDURE
1. Before starting the assay, make sure all the samples and
BLUESTAR® Identi-HEM® reaction devices are at room
temperature.
2. Remove the reaction device from its protective pouch by
tearing along the notches.
3. Break the collection tube tip (Fig. 1), then squeeze the
tube to dispense 4 drops of the obtained solution into
the reagent device well (Fig. 2).
Fig. 1 Fig.2
4. Read the results 10 minutes after the sample was added.
RESULT INTERPRETATION
Negative
Only one coloured line appears
into the control zone (C),
indicating the test was correctly
performed and the reagents
correctly work.
No line appears into the test
zone (T).
Positive
In addition with the coloured line
into the control zone (C), a
coloured line clearly visible also
appears into zone (T), indicating
the sample contains human
haemoglobin.
Even a very pale line should be
interpreted as a positive result.
Invalid
If no coloured line appears into
the control zone (C), the test is
invalid. In this case, it is
recommended to restart the
test with a new device.
TEST PERFORMANCES
Sensitivity
The BLUESTAR® Identi-HEM® test can detect very low
quantities of haemoglobin.
After dilution into the extraction buffer, the minimum haemoglobin
level detected by the BLUESTAR® Identi-HEM® test is
0.01 µg/mL.
Cross-reactivity
The BLUESTAR® Identi-HEM® test is manufactured using 2
highly sensitive and specific antihuman haemoglobin monoclonal
antibodies.
Ox, pig, rabbit, horse and sheep haemoglobin (ie whole blood)
does not react with BLUESTAR® Identi-HEM®. Moreover, the
human blood components such as albumin, haptoglobin,
myoglobin and transferring also result in negative results.
Hook effect
Very high-level haemoglobin samples resulted in positive results
up to 2 mg/ml after dilution into the extraction buffer.
Nevertheless, too concentrated samples may result in negative
results because of the hook effect, a phenomenon very well
known in immunologic assays.
In case of doubt for some samples, it is then necessary to retest
after 1/100 or 1/1,000 dilution.
BIBLIOGRAPHY
1- D.M. Parkin, E. Laara and C.S. Muir. "Estimates of the
worldwide frequency of sixteen major cancers in 1980." Int.
J. Cancer, Volume 41 : 184-197. 1988
2- Sidney J. Winaver, Paul Sherlock, David Schottenfeld and
Daniel G. Miller. "Clinical trends and topics : Screening for
colon cancer." Gastroenterology, volume 70: 783-789. 1976
3- S.J. Winaver, S.D. Leidner, D.G. Miller, D. Schottenfeld, B.
Befler, R.C. Kurtz, P. Sherlock and M. Stearns. "Results of
a screening program for the detection of early colon cancer
and polyps using fecal occult blood testing." Abstracts of
paper, Volume 72 (n°5): A-127/1150. 0..1977
4- D.J. Frommer, A. Kapparis and M.K. Brown. "Improved
screening for colorectal cancer by immunological detection
of occult blood." British medical journal, Volume 296: 1092-
1094. 1988
5- Jerome B. Simon. "Occult blood screening for colorectal
carcinoma: a critical review." Gastroenterology, Volume 88:
820-837. 1985
Temperature limitation
+4°C — +30°C
Please read instructions
leaflet
Do not reuse
Ref. VD-HEM-6: 6 x BLUESTAR® Identi-HEM® tests
Ref. VD-HEM-24: 24 x BLUESTAR® Identi-HEM® tests
Made in EU.
BLUESTAR
P.O. box 246, MC 98005 MONACO Cedex
Phone: +(377) 97 97 31 77
Fax: +(377) 97 97 31 61
e-mail: [email protected]
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BlueStar FORENSIC IDENTI-HEM User guide

BlueStar
Brand
BlueStar
Model
FORENSIC IDENTI-HEM
Type
User guide
This manual is also suitable for
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